four-minute man vs Sir Roger Gilbert Bannister

four-minute man and Sir Roger Gilbert Bannister both are nouns.

Word	Noun	Adjective	Verb	Adverb
four-minute man	Yes	No	No	No
Sir Roger Gilbert Bannister	Yes	No	No	No

four-minute man (noun)	Sir Roger Gilbert Bannister (noun)
someone who has run the mile in less than 4 minutes	English runner who in 1954 became the first person to run a mile in less than four minutes (born in 1929)